#include<bits/stdc++.h>
using namespace std;
int n,a[1000010],cnt,xiangtong[1000010],maxn;
int main(){
    freopen("duel.in","r",stdin);
    freopen("duel.out","w",stdout);
    cin>>n;
    for(int i=1;i<=n;i++) cin>>a[i];
    for(int i=1;i<=n;i++) if(a[i]==2) cnt+=1;
    if(cnt>n/2) cout<<cnt;
    else cout<<n-cnt;
    return 0;
}
